Water flowing from the tap often looks clear, but this visual calmness can be deceptive. It dissolves salts of heavy metals, chlorine, rust and many impurities invisible to the eye, which negatively affect human health and the life of household appliances. To understand how modern systems handle cleaning, you need to look inside the device and consider a water filter in the cutout, where each layer performs a strictly defined function.
Modern filtration systems are complex engineering designs created at the junction of chemistry and mechanics. Filter device It depends on its type, whether it is a simple pitcher or a multi-stage reverse osmosis system. Understanding the internal architecture allows not only to correctly choose the equipment, but also to properly maintain it, replacing consumables in a timely manner.
Consideration of the design in the section opens the veil of mystery over how exactly the dirty water turns into crystal clear. We will analyze the main nodes, membrane materials and the principles on which cleaning is based. This knowledge will help you avoid common operating errors and understand why some models are more expensive than others.
Principles of mechanical cleaning and pre-filters
Any water path in a purification system starts with a mechanical barrier. It is here that the primary sifting of large suspensions, sand, silt and rust occurs. In the section, this element is most often a foamed polypropylene or wound thread, the structure of which creates a maze for contamination.
Inside the mechanical cleaning cartridge, water passes through a variety of micropores. Deep filtration It works by trapping particles inside the material, not just on the surface. This allows the cartridge to take on a significant amount of dirt without a critical drop in pressure in the system.
The pore size in such elements can vary from 1 to 5 microns. The denser models are able to delay even microscopic suspension, which in the future could clog thinner membranes. It is important to understand that the resource of this element directly depends on the quality of the incoming water.
- 🌊 Detains sand, rust and large suspensions
- ⏳ Extends the service life of subsequent cleaning steps
- 📉 Reduces the turbidity of water to a transparent state
- 🛡️ Protects the pumping equipment from abrasive wear
⚠️ Warning: If you see that the prefilter body has changed color to brown or brown, this is a signal for an urgent replacement of the cartridge. The operation of the system with the exhausted resource of mechanics will lead to the slipping of dirt to the next stages.
Interestingly, the structure of polypropylene filament can be different. Some models use gradient density, where the outer layers delay the large fraction and the inner layers retain the small fraction. This approach maximizes the cartridge resource.
Coal blocks and sorption cleaning
After mechanical cleaning, water enters the coal block. In the cut, we see compressed granular activated carbonIt is often derived from coconut shells. This material has a colossal porous surface that works like a sponge for chemical compounds.
The main task of this stage is the removal of chlorine, organic compounds and improving taste. The coal adsorbs the chlorine molecules, preventing them from entering subsequent nodes of the system, which is especially critical for reverse osmosis systems, where the membrane is sensitive to oxidants.
The quality of coal is determined by its iodine number and the origin of the raw materials. Cheap analogues can be washed out and give a black coating, while high-quality coconut coal serves long and efficiently. The internal structure of the block is often enhanced by silver-containing additives for bacteriostatic effect.
Check the date of production of the coal cartridge before buying. Coal tends to be saturated with oxygen from the air over time, losing some of its adsorption capacity even without contact with water.
In some systems, the coal block is combined with an ion exchange resin. This allows you to simultaneously remove organic matter and reduce the hardness of the water, preventing the formation of scale. This combination makes the water softer and more pleasant to taste.
Reverse osmosis membrane design
The heart of the reverse osmosis system is the semipermeable membrane. In the section of a standard industrial cartridge, we will see a thin-film structure rolled up into a roll. This roll is wound around a perforated tube that serves as a collector to collect purified water.
The pore size of the membrane is only 0.0001 microns. Only water molecules and some gases can pass through such a barrier. All dissolved salts, viruses, bacteria and heavy metals are trapped and washed into the drain by a stream of concentrate.
Structurally, the element consists of several layers: a protective layer, a semi-permeable film and a drainage mesh. Reverse osmosis It requires pressure to push water through the membrane, so systems often have a boost pump installed.
| Parameter | Mechanical filter | Coal block | Osmosis membrane |
|---|---|---|---|
| Pore size | 1-5 microns | 10-20 microns | 00001 microns |
| Substantive function | Sand protection | Chlorine removal | Demineralization |
| Resource (mo) | 3-6 | 6-12 | 12-24 |
| drainage | No. | No. | Yes (up to 75%) |
It is important to note that the efficiency of the membrane depends on the water temperature and pressure in the system. Cold water is filtered more slowly, and low pressure reduces the quality of cleaning and increases the percentage of concentrate discharged into the sewer.
⚠️ Warning: Never try to wash or regenerate the reverse osmosis membrane at home. The thin film is irreversibly damaged by mechanical action or the use of acids.
Postfilters and water mineralization
After the membrane, the water becomes almost distilled, which is not always useful for constant drinking. At this stage, the system is included in the mineralizer. In the section of this node is a capsule with natural minerals that saturate water with calcium, magnesium and other useful elements.
The final barrier is often a post-filter with activated carbon. It is necessary to improve the taste of the water, which may have changed after passing through the storage tank. In the tank, the water can acquire a slight taste of plastic or stagnation, which the coal successfully eliminates.
The design of the mineralizer can be flowing or with the possibility of adjusting the level of mineralization. Passing through the layer of mineral crumbs, water is enriched in a natural mode, becoming physiologically complete.
- 💧 Restores the pH balance of water
- 🦴 Adds the necessary body calcium and magnesium
- 👅 Improves the taste of purified water
- 🚫 Prevents the leaching of minerals from the body
Some users prefer to bypass the mineralizer using water for cooking and mineralized water for drinking. The design of reverse osmosis systems often makes it easy to switch flows with an additional crane.
Why can water after osmosis foam?
The water after reverse osmosis is very soft and has a low surface tension. When actively stirred in a kettle or jug, it can form temporary foam from dissolved air, which is a normal physical phenomenon rather than a sign of contamination.
Storage tanks and automation
Reverse osmosis systems cannot produce water instantly in large volumes, so they are equipped with a storage tank. Inside the tank is an elastic pearIt divides the space into two parts: for water and for air under pressure.
The principle of operation is based on air compression. When the pump fills the pear with water, the air is compressed, creating pressure that subsequently pushes the water out of the well-pressured tap. Without this element, the pressure would be a barely noticeable trickle.
The system's automation includes an electromagnetic valve and level sensors. Solenoid valve It blocks the water supply to the membrane when the tank is full and opens it when the water level drops. This ensures fully autonomous operation without human intervention.
Automation diagram:1. Opening of the crane -> Falling pressure in the tank
2. Low-level sensor activation
3. Opening of the electromagnetic valve
4. Starting the filtration process
The tank volume usually varies from 5 to 12 liters, but the actual water supply is about 60-70% of the face value due to the volume of the air chamber. For large families, there are increased volume tanks or direct current systems without a tank.
☑️ Diagnostics of tank problems
Typical malfunctions and their causes
Even the most reliable water filter in the section shows vulnerabilities during long-term operation. Often problems arise due to untimely replacement of cartridges, which leads to silting of internal cavities and housings.
One of the frequent problems is the depressurization of compounds. Rubber O-rings tan or deform over time, causing leakage. In high pressure systems, this can cause the kitchen to flood.
Another common malfunction is the failure of the concentrate discharge valve. If it jams in the open position, the water will constantly go into drainage, and the meters will spin at a breakneck speed. If in a closed one, the membrane will quickly become dirty and fail.
⚠️ WARNING: When you hear a whistle or hum in the system, do not ignore these sounds. They may indicate cavitation in the pump or air surge, which requires immediate intervention to prevent the pump from breaking.
Diagnosis should begin with a visual inspection and checking the pressure in the system. Using a pressure gauge allows you to determine exactly where the loss of pressure or pressure occurs.
Regular replacement of pre-purification cartridges (mechanics and coal) 3 times prolongs the life of the expensive reverse osmosis membrane and prevents 90% of system breakdowns.
Frequently Asked Questions (FAQ)
How often should I change the cartridges in the reverse osmosis system?
The frequency of replacement depends on the quality of the original water and the volume of consumption. Mechanical filters are changed every 3-6 months, coal post-filters - every 6-12 months. The reverse osmosis membrane lasts from 1.5 to 3 years. The mineralizer and post-filter require replacement every 6-12 months.
Why does the water filter in the section show different layers of filler?
Different layers of filler are necessary for multi-stage cleaning. Each layer is responsible for the removed contaminants: mechanics trap solids, coal removes chemistry, and resin or membrane removes salts. Mixing the layers would reduce the efficiency of cleaning.
Can I drink water immediately after the membrane without mineralization?
Water is technically safe to drink. However, long-term use of fully demineralized water is not recommended by nutritionists, as it can flush minerals from the body. Installation of mineralizer solves this problem.
What to do if the water pressure from the tap falls?
First, check the pressure in the plumbing. If it is normal, most likely clogged cartridges pre-purification or exhausted membrane resource. Also, the cause may be insufficient air pressure in the tank.